Improvement in metallic roofings



s. T. a. MURSIELL.

Metallic Roofing I No. 165,113 V PatentedJune29,I87-5.

FIG 2.

WITNESSE 1m. pm

THE GRAPHIC 60. PH 0T0 -L|TH. 39 ll 41 PARK PLACE. N.Y

UNITED STATES PATENT Drrron.

SAMUEL T. e. MORSELL, or WASHINGTON, DISTRICT or COLUMBIA.

IMPROVEMENTIN METALLl ROOFINGS.

Specification forming part of Letters Patent N0. 165,] 13, dated June29, 1875 application filed June 18, 1875. I

To all whom it may concern:

Be it known that I, SAMUEL T. G. MORSELL, of the city and county ofWashington, in the District of Columbia, have invented certain new anduseful Improvements in Sheet-Metal Roofing, of which the following is aspecification:

The sheet-metal covering of the root is prepared in long strips withupturned edges lying against ribs which project upward from thesheathing, and covered by caps of sheet metal, the whole being securedby screw-bolts passing completely through-the caps, ribs, and upturnededges in the roof-sheets, as hereinafter described.

The angles of the roof-sheets are left free to permit expansion andcontraction with changes of temperature ina direction parallel with theridge of the roof. The through-bolts afford absolutely fixed points ofattachment, and are sufficiently near together to distribute the strainof expansion or contraction, so as to render it harmless while they holdthe sheet metal immovably at those points.

In the accompanying drawings, Figure 1 is a perspective view of afragment of a roof illustrating the invention. Fig. 2 is a longitudinalsection of the same.

A represents a part of the wooden sheathing of a roof. B B are ribs ofwood, secured thereto by screws 0, or other suitable means. The ribs '13run transversely of the roof, or in the direction of its slant. D Drepresent strips of sheet metal with upturned edges d lying flat againstthe vertical sides of the ribs B E E are caps of sheet metal bent to fitover the ribs B and upturned edges 01 ofthe roof-plates. F arescrew-bolts, passed 00!!)- pletely through the vertical sides of thecaps E, the upturned edges 01 of the roof-sheets,

and the rib B, as represented in Fig. 2. The said bolts are secured bynuts Gr bearing on washers H, in customary manner.

It has before been attempted to secure metallic-rooiin g sheets bynailing their upturned edges and the caps whichcover the same to ribs onthe sheathing, but this mode of fixing has proved inadequate to sustainthe severe and constantly-recurrin g strains to which the sheets aresubjected by reasons of changes in temperature; and hence it is foundthat such roofs become insecure after a brief period.

By my mode of securing the parts together at short intervals by means ofthrough-bolts, giving an absolutely unyielding and immovable fastening,the strains are so distributed throughout the length of the roof-sheetsfrom the ridge to the cave that no injury can occur.

The screws 0, being entirely concealed and covered by the sheet-metalcaps E, afford no opening for leakage, the only external apertures beingoccupied by the through-bolts F, and the edges of the sheet metal uponthe apertures being tightly clamped by the boltheads and nuts, it isimpossible for leakage to occur at these points.

The invention is alike applicable to root's constructed with iron frameswithout sheathmg.

The following is claimed as new:

The combination of the sheathing A, vertical ribs B, roof-sheets D,vertically-upturned edges d, the sheet-metal caps E, and throughboltsF,all as herein described, for the purposes set forth.

S. T. G. MORSELL.

Witnesses:

'OCTAVIUS KNIGHT, OHAs. J. Gooon.

